I became infatuated with the idea of owning a Harbeth speaker for a while. I auditioned the 30s but ended up buying a pair of SuperHL5 plus as I felt they were a step up in every way - airiness, neutrality, bass depth and control, realism.
Thought maybe I could replace my Thiel 3.7s with them but no. I found in comparing them the Thiels did just about everything better than the Harbeths. They had the beautiful tone, but were just less boxy, cleaner and more realistic, without sounding thin. So I sold the Harbeths. Great speakers to be sure though!